<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>活用 border-radius, 实现充电动画</title>
</head>
<body>
<div class="container">
    <div class="header"></div>
    <div class="battery"></div>
    <div class="battery-copy">
        <div class="g-wave"></div>
        <div class="g-wave"></div>
        <div class="g-wave"></div>
    </div>
</div>
</body>
</html>
